Results 21 to 30 of about 296 (107)

Phase I Activities of the Earth Mapping Resources Initiative (Earth MRI) in the Western Kentucky Fluorspar District [PDF]

, 2022
The Western Kentucky Fluorspar District (WKFD), which comprises the Kentucky portion of the Illinois–Kentucky Fluorspar District, is well known for the occurrence of strategically important critical mineral resources, such as fluorite (fluorspar) and ...
Hickman, John B, Andrews, William M., Jr., Curl, Douglas C., Dietsch, Craig, Pulliam, Carrie, Lukoczki, Georgina, Morris, Emily, Vicroy, Stephanie   +7 more
core   +1 more source

Erratum to: U–Pb (ID-TIMS) Age of Garnet from Aillikites of the Kola Alkali Province

Doklady Earth Sciences, 2023
An Erratum to this paper has been published: https://doi.org/10.1134 ...
M. V. Stifeeva, E. B. Salnikova, A. A. Nosova, A. B. Kotov, A. A. Voznyak, D. A. Dimitrova   +5 more
openaire   +1 more source

Between carbonatite and lamproite—Diamondiferous Torngat ultramafic lamprophyres formed by carbonate-fluxed melting of cratonic MARID-type metasomes [PDF]

, 2008
New U–Pb perovskite ages reveal that diamondiferous ultramafic lamprophyre magmas erupted through the Archean crust of northern Labrador and Quebec (eastern Canada) between ca.
S. Tappe, S. Foley, B. Kjarsgaard, R. Romer, L. Heaman, A. Stracke, G. Jenner   +6 more
semanticscholar   +3 more sources

Aillikites and Alkali Ultramafic Lamprophyres of the Beloziminsky Alkaline Ultrabasic-Carbonatite Massif: Possible Origin and Relations with Ore Deposits [PDF]

Minerals, 2020
The 650–621 Ma plume which impinged beneath the Siberian craton during the breakup of Rodinia caused the formation of several alkaline carbonatite massifs in craton margins of the Angara rift system. The Beloziminsky alkaline ultramafic carbonatite massif (BZM) in the Urik-Iya graben includes alnöites, phlogopite carbonatites and aillikites.
Igor Ashchepkov, Sergey Zhmodik, Dmitry Belyanin, Olga N. Kiseleva, Nikolay Medvedev, Alexei Travin, Denis Yudin, Nikolai S. Karmanov, Hilary Downes   +8 more
openaire   +1 more source

Geochemical and O–C–Sr–Nd Isotopic Constraints on the Petrogenetic Link between Aillikites and Carbonatites in the Tarim Large Igneous Province

Journal of Petrology, 2021
AbstractAillikites are carbonate-rich ultramafic lamprophyres often associated with carbonatites. Despite their common field relationships, the petrogenetic links, if any, between aillikites and carbonatites remain controversial. To address this question, this study reports the results of a detailed geochemical and isotopic examination of the Permian ...
Changhong Wang, Zhaochong Zhang, Andrea Giuliani, Zhiguo Cheng, Bingxiang Liu, Weiliang Kong   +5 more
openaire   +1 more source

Calcium isotopes track volatile components in the mantle sources of alkaline rocks and associated carbonatites [PDF]

, 2023
The volatile components CO2 and H2O induce mantle melting and thus exert major controls on mantle heterogeneity. Primitive intraplate alkaline magmatic rocks are the closest analogues for incipient mantle melts and provide the most direct method to ...
Tappe, Sebastian, Foley, Stephen F., Feng, Lanping, Liu, Yongsheng, Ren, Huange, Chen, Chunfei   +5 more
core   +1 more source

Tectono-magmatic evolution of the younger Gardar southern rift, South Greenland [PDF]

Geological Survey of Denmark and Greenland Bulletin, 2013
The 1300–1140 Ma Gardar period in South Greenland involved continental rifting, sedimentation and alkaline magmatism. The latest magmatism was located along two parallel rift zones, Isortoq–Nunarsuit in the north and the Tuttutooq–Ilimmaasaq–Narsarsuaq ...
Brian G.J. Upton
doaj  

A few thoughts on the diamondiferous nature of lamprophyres from Wajrakarur Kimberlite Field, Southern India

Mineralogia
Lamprophyre Clan Rocks (LCRs) such as lamprophyres, lamproites and kimberlites are reported from many parts of the cratonic areas in India, especially the diamondiferous Eastern Dharwar Craton (EDC).
Phani P. Ramesh Chandra, Kamvisis Ioannis   +1 more
doaj   +1 more source

Petrogenesis of the diamondiferous Pipe-8 ultramafic intrusion from the Wajrakarur kimberlite field of Southern India and its relation to the worldwide Mesoproterozoic (~1.1 ​Ga) magmatism of kimberlite and related rocks

, 2020
Detailed mineralogy, bulk rock major, trace and Sr–Nd isotope compositions, and 40Ar/39Ar dating of the Pipe-8 diamondiferous ultramafic intrusion in the Wajrakarur cluster of southern India, is reported. Based on the presence of Ti-rich phlogopite, high
A. Dongre, K. Viljoen, G. Belyanin, P. L. le Roux, M. Malandkar   +4 more
semanticscholar   +1 more source

Data for: Sr-Nd-Pb isotopic systematics and Rb-Sr, Ar-Ar, U-Pb dating of ultramafic alkaline magmatism of the southwestern margin of the Siberian Craton: metasomatism of the sub-continental lithospheric mantle related to subduction and plume events

, 2021
Based on mineralogical composition and the presence of typomorphic minerals, Chadobec UMLs are classified as aillikite, cpx-aillikite, mela-aillikite and damtjernite.
Nosova, Anna
core   +1 more source